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Description:

This dataset was collected on a line transect survey in gilgai territory in New South Wales, Australia. Gilgais are natural gentle depressions in otherwise flat land, and sometimes seem to be regularly distributed. The data collection was stimulated by the question: are these patterns reflected in soil properties? At each of 365 sampling locations on a linear grid of 4 meters spacing, samples were taken at depths 0-10 cm, 30-40 cm and 80-90 cm below the surface. pH, electrical conductivity and chloride content were measured on a 1:5 soil:water extract from each sample.

Variables:

This data frame contains the following columns:

pH00

pH at depth 0–10 cm.

pH30

pH at depth 30–40 cm.

pH80

pH at depth 80–90 cm.

e00

electrical conductivity in mS/cm (0–10 cm).

e30

electrical conductivity in mS/cm (30–40 cm).

e80

electrical conductivity in mS/cm (80–90 cm).

c00

chloride content in ppm (0–10 cm).

c30

chloride content in ppm (30–40 cm).

c80

chloride content in ppm (80–90 cm).

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References/Notes/Attributions:

Source

Webster, R. (1977) Spectral analysis of gilgai soil. Australian Journal of Soil Research 15, 191–204.

Laslett, G. M. (1989) Kriging and splines: An empirical comparison of their predictive performance in some applications (with discussion). Journal of the American Statistical Association 89, 319–409

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

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